A、Hosting a seminar. B、Giving a lecture. C、Giving a report. D、Introducing a book. A 女士在一次研讨会上介绍一位著名的建筑学家，可见女士是以研讨会主持人的身份出现的。故答案为

W: I can’t seem to tune the station I want．Funny．I found it yesterday．
M: Maybe you should put the antenna up．I hope you’ll find it soon．The talk show is about to begin．You don’t want to miss it，do you?
Q: What do we learn from the conversation about the speakers?

W: We ale delighted to have Dr. Smith，the distinguished expert in architecture，to give us a report on his latest book．Good morning，Dr. Smith．
M: I’d like to express my appreciation to the president for her introduction It’s my great honor to address in this symposium．
Q: What is the woman doing?